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For those who have believed the gospel and been baptised into Christ, strength comes from putting their trust in God.
If we take Paul as an example, he was troubled by an unspecified affliction and he prayed for its removal.
2 Corinthians 12:8 For this thing I besought the Lord thrice, that it might depart from me. 9 And he said unto me, My grace is sufficient for thee: for my strength is made perfect in weakness. Most gladly therefore will I rather glory in my infirmities, that the power of Christ may rest upon me. 10 Therefore I take pleasure in infirmities, in reproaches, in necessities, in persecutions, in distresses for Christ’s sake: for when I am weak, then am I strong.
This teaches us that our strength must lie in a firm dependence upon God. The less we depend upon ourselves and the more we rely upon God the greater our strength will become.
2 Corinthians 13:4 For though he (Christ) was crucified through weakness, yet he liveth by the power of God. For we also are weak in him, but we shall live with him by the power of God toward you.
That we should put our trust in God to be strengthened by him is a recurring theme in scripture.
1 Chronicles 29:12 Both riches and honour come of thee, and thou reignest over all; and in thine hand is power and might; and in thine hand it is to make great, and to give strength unto all.
Psalms 18:2 The LORD is my rock, and my fortress, and my deliverer; my God, my strength, in whom I will trust; my buckler, and the horn of my salvation, and my high tower.
Psalms 27:1 A Psalm of David. The LORD is my light and my salvation; whom shall I fear? the LORD is the strength of my life; of whom shall I be afraid?
Psalms 28:7 The LORD is my strength and my shield; my heart trusted in him, and I am helped: therefore my heart greatly rejoiceth; and with my song will I praise him.
Psalms 34:8 O taste and see that the LORD is good: blessed is the man that trusteth in him.
Psalms 37:39 But the salvation of the righteous is of the LORD: he is their strength in the time of trouble.
Psalms 73:26 My flesh and my heart faileth: but God is the strength of my heart, and my portion for ever.
Proverbs 3:5 Trust in the LORD with all thine heart; and lean not unto thine own understanding. 6 In all thy ways acknowledge him, and he shall direct thy paths.
Proverbs 22:17 Bow down thine ear, and hear the words of the wise, and apply thine heart unto my knowledge. 18 For it is a pleasant thing if thou keep them within thee; they shall withal be fitted in thy lips. 19 That thy trust may be in the LORD, I have made known to thee this day, even to thee.
Isaiah 40:29 He giveth power to the faint; and to them that have no might he increaseth strength.
Hebrews 13:6 So that we may boldly say, The Lord is my helper, and I will not fear what man shall do unto me.
1 Peter 5:6 Humble yourselves therefore under the mighty hand of God, that he may exalt you in due time: 7 Casting all your care upon him; for he careth for you.
We are to remember that Christ died for us because our strength is small.
Romans 5:6 For when we were yet without strength, in due time Christ died for the ungodly.
If we are in Christ and live by his commandments, we can gain strength from the comfort of the scriptures which recount how God deals mercifully with men and women of faith.
Romans 15:4 For whatsoever things were written aforetime were written for our learning, that we through patience and comfort of the scriptures might have hope.
Our aim should be to attain to the confidence in God that Job had.
Job 13:15 Though he slay me, yet will I trust in him...
As members of the one body we are to strengthen and encourage one another. It may be beneficial to shift the emphasis from our own weakness and consider how we might strengthen others from the scriptures.
Galatians 6:2 Bear ye one another‘s burdens, and so fulfil the law of Christ.
I hope you have found this helpful.
May God bless you,