Rejoice in the Lord always. Again I will say, rejoice! Philippians 4:4 NKJV
All the days of the desponding and afflicted are made evil [by anxious thoughts and forebodings], but he who has a glad heart has a continual feast [regardless of circumstances]. Proverbs 15:15 AMP
It is our duty and privilege to rejoice in the Lord – at all times and in all conditions. The joy of the Lord is our strength (Neh. 8:10)! The Lord supplies us with all the grace we need to meet any circumstance of life fully (2 Cor. 12:9). Our attitudes color every aspect of our lives. We cannot always choose what happens to us, but we can choose our attitude toward the situation and how we respond. The secret to a happy heart and a happy life is to fill our thoughts with things that are good, pure, and lovely, dwelling on the good things in life (Phil. 4:8). If good men (and women) do not have a continual feast, it is by their own choice – they cannot blame God -it is their own fault (Prov. 15:15)!
We rejoice because God has made our heart glad:
Is anyone among you afflicted (ill-treated, suffering evil)? He should pray. Is anyone glad at heart? He should sing praise [to God]. James 5:13 AMP
We choose to rejoice; and rejoice again:
Finally, my brethren, rejoice in the Lord. Philippians 3:1a KJV
Rejoice in the Lord always. Again I will say, rejoice! Philippians 4:4 NKJV
Rejoice always. 1 Thessalonians 5:16 NKJV
We rejoice jubilantly – in high spirits:
But let all those who take refuge and put their trust in You rejoice; let them ever sing and shout for joy, because You make a covering over them and defend them; let those also who love Your name be joyful in You and be in high spirits. Psalms 5:11 AMP
But let the [uncompromisingly] righteous be glad; let them be in high spirits and glory before God, yes, let them [jubilantly] rejoice! 4 Sing to God, sing praises to His name, cast up a highway for Him Who rides through the deserts — His name is the Lord — be in high spirits and glory before Him! Psalms 68:3-4 AMP
We rejoice because we are the righteousness of God in Jesus Christ and partakers of His holiness:
Be glad in the Lord and rejoice, you [uncompromisingly] righteous [you who are upright and in right standing with Him]; shout for joy, all you upright in heart! Psalms 32:11 AMP
Rejoice in the Lord, O you [uncompromisingly] righteous [you upright in right standing with God]; for praise is becoming and appropriate for those who are upright [in heart]. Psalms 33:1 AMP
The [uncompromisingly] righteous shall be glad in the Lord and shall trust and take refuge in Him; and all the upright in heart shall glory and offer praise. Psalms 64:10 AMP
Light is sown for the [uncompromisingly] righteous and strewn along their pathway, and joy for the upright in heart [the irrepressible joy which comes from consciousness of His favor and protection]. 12 Rejoice in the Lord, you [consistently] righteous (upright and in right standing with God), and give thanks at the remembrance of His holiness. Psalms 97:11-12 AMP
We rejoice because He is our provider; our source and supply:
Delight yourself also in the Lord, and He will give you the desires and secret petitions of your heart. Psalms 37:4 AMP
Fear not, O land; be glad and rejoice, for the Lord has done great things! 22 Be not afraid, you wild beasts of the field, for the pastures of the wilderness have sprung up and are green; the tree bears its fruit, and the fig tree and the vine yield their [full] strength. 23 Be glad then, you children of Zion, and rejoice in the Lord, your God; for He gives you the former or early rain in just measure and in righteousness, and He causes to come down for you the rain, the former rain and the latter rain, as before. Joel 2:21-23 AMP
We rejoice because He is our comforter and defender:
When I said, My foot is slipping, Your mercy and loving-kindness, O Lord, held me up. 19 In the multitude of my [anxious] thoughts within me, Your comforts cheer and delight my soul! Psalms 94:18-19 AMP
We rejoice because sorrow is not an option:
A glad heart makes a cheerful countenance, but by sorrow of heart the spirit is broken. Proverbs 15:13 AMP
All the days of the desponding and afflicted are made evil [by anxious thoughts and forebodings], but he who has a glad heart has a continual feast [regardless of circumstances]. Proverbs 15:15 AMP
We rejoice in His goodness:
So now arise, O Lord God, and come into Your resting place, You and the ark of Your strength and power. Let Your priests, O Lord God, be clothed with salvation, and let Your saints (Your zealous ones) rejoice in good and in Your goodness. 2 Chronicles 6:41 AMP
We rejoice because our names are written down in heaven:
Nevertheless do not rejoice in this, that the spirits are subject to you, but rather rejoice because your names are written in heaven. Luke 10:20 NKJV
Finally:
I will sing to the Lord as long as I live; I will sing praise to my God while I have any being. 34 May my meditation be sweet to Him; as for me, I will rejoice in the Lord. Psalms 104:33-34 AMP
As for me I WILL rejoice in the Lord!