Jesus answering said, “Have faith in God.” Mark 11:22 “Let not your heart be troubled. Believe in God, believe also in me.” John 14:1
Faith is given by the Spirit of God (1 Cor. 12:9). “That your faith should not stand in the wisdom of men, but in the power of God” (1 For. 2:5).
There are honest people in whom we have confidence, and if we can only get their word we believe they will do as they say. It is possible to live so in touch with God and know him so well that we can have the same confidence, and even greater, in him than we could have in the most honorable person in the world; for while man often fails, God does not change, and can never fail. But we seem to easily fall into the habit of believing with our minds, and fail to get the depth of real heart assurance before God. The difference between the two ways of believing is as vast as the difference between daylight and darkness. Even though all else should fail, God remains faithful. Then why should we not believe him and obtain all he has for us? There is no reason for its being otherwise if we abide in him. “The just shall live by faith.” All the evil in the world can not overcome us if we have our confidence established in God. He has promised that no evil shall befall us, for he is able to establish us. (Rom. 16: 25,26)
James 1: 23-25 may be applied to faith as well as works. Doubting should never enter our minds, for after we have tasted of the love of God and known the truth we should continue therein; for God abides faithfully whether our faith goes up or down. “Fight the good fight of the faith. Take hold of the eternal life to which you were called when you made your good confession in the presence of many witnesses.” (1 Tim. 6:12) We have the privilege of proving before many witnesses the profession of our faith if we will but stand true to God—“Without spot, unrebukable unto the appearing of our Lord Jesus Christ.” “And this is the will of him that sent me, that every one who sees the Son and believes in him, may have everlasting life and I will raise him up at the last day.” (John 6:40)
The promises of God set a wave of joy rolling in the should of a believer. Then this joy overflows and brings joy to some other should and as it is caught up by that soul and fills it to overflowing, it rolls on and on from one heart to another; for it will enter every heart that with a sincere purpose believes in God and desires to serve him. “Truly, Truly I say to you, he who believes in me has everlasting life” (John 6:47).