1. Carefully read the Word and meditate on it. Through reading the Word of God, and especially through meditation on it, the believer becomes acquainted with the nature and character of God. Besides God’s holiness and justice, he realizes what a kind, loving, gracious, merciful, mighty, wise, and faithful Father He is. Therefore, in poverty, affliction, death of loved ones, difficulty in service, or financial need, he will rest on the ability of God to help him. He has learned from the Word that God is almighty in power, infinite in wisdom, and ready to help and deliver His people. Reading the Word of God, together with meditation on it, is an excellent way to strengthen faith.
2. We must maintain an upright heart and a good conscience and not knowingly and habitually indulge in things which are contrary to the mind of God. How can I possibly continue to act in faith if I grieve the Lord and detract from His glory and honor? All my confidence in God and all my leaning on Him in the hour of trial will be gone if I have a guilty conscience and yet continue in sin. If I cannot trust in God because of a guilty conscience, my faith is weakened.
With every fresh trial, faith either increases by trusting God and getting help, or it decreases by not trusting Him. A habit of self-dependence is either defeated or encouraged. If we trust in God, we do not trust ourselves, our fellowmen, circumstances, or in anything else. If we do trust in one or more of these, we do not trust in God.
3. If we desire our faith to be strengthened, we should not shrink from opportunities where our faith may be tried. The more I am in a position to be tried in faith, the more I will have the opportunity of seeing God’s help and deliverance. Every fresh instance in which He helps and delivers me will increase my faith. The believer should not shrink from situations, positions, or circumstances in which his faith may be tried, but he should cheerfully embrace them as opportunities to see the hand of God stretched out in help and deliverance. Thus his faith will be strengthened.
4. The last important point for the strengthening of our faith is that we let God work for us and do not work a deliverance of our own. When a trial of faith comes, we are naturally inclined to distrust God and to trust in ourselves, in our friends, or in circumstances. We would rather work a deliverance of our own than simply look to God and wait for His help. But if we do not patiently wait for God’s help, or if we work a deliverance of our own, then at the next trial of our faith we will have the same problem. We will again be inclined to try and deliver ourselves. With every fresh trial, our faith will decrease. On the contrary, if we stand firm in order to see the salvation of God, trusting in Him alone, our faith will be increased. Every time we see the hand of God stretched out on our behalf in the hour of trial, our faith would be increased even more. God will prove His willingness to help and deliver at the perfect time.
-George Muller, The Autobiography of George Muller