“He [Abraham] did not weaken in faith when he considered his own body, which was as good as dead (since he was about a hundred years old), or when he considered the barrenness of Sarah's womb. No unbelief made him waver concerning the promise of God, but he grew strong in his faith as he gave glory to God, fully convinced that God was able to do what he had promised.”
When you act in faith, you give the glory to God for the outcome!
“No unbelief made him waver concerning the promise of God, but he grew strong in his faith as he gave glory to God”. Abraham knew that what God had promised was impossible for men, but he chose to believe God, and in expressing his faith, he constantly gave God the glory for what he did.
When you are truly acting in faith, you will not go around parading the greatness of your faith and looking for the praise of others. Rather, you will be so completely aware that it was God who did it that you will look for any way possible to glorify him and downplay yourself.
When you share with others about what the Lord has done in your life, God is watching to see if you honour him or yourself in the way that you share it. He wants you to share about what he is doing for you, and when you do, be sure your words point people to him.