So it is clear that no one can be made right with God by trying to keep the law. For the Scriptures say, “It is through faith that a righteous person has life.” Galatians 3:11 (NLT)
Four times the Bible says the just or righteous shall live by faith. Habakkuk 2:4; Romans 1:17; Galatians 3:11; Hebrews 10:38.
Faith is trust. Who or what you have faith in, you trust.
God is the source of all good things. James 1:17. He’s the source and sustainer of existence and life.
Therefore, living by faith is trusting in this God who’s the source and sustainer of life and every good thing.
It is looking to him expectantly everyday knowing that he supplies whatever we need. Psalms 145:15-16 The eyes of all look to you, and you give them their food at the proper time. You open your hand and satisfy the desires of every living thing.
You can only have faith or trust in someone or something you clearly and closely know. Faith in God is the automatic result and response to knowing him intimately. For instance, because we know God loves us we believe in him, we trust him.
1 John 4:16 And we have known and believed the love that God has for us. God is love, and he who abides in love abides in God, and God in him. (NKJV). John says we have known and believed. In other words, knowing God results in believing or faith in God. It’s the very same exact truth Paul affirms in Romans 10:17 that faith comes by hearing the Word of God. Therefore, living by faith is living by the knowledge of God. Not mere head knowledge or crammed religious facts about him but rather personal intimate acquaintance with him. For example, it is waking up every day, going through the day handling our responsibilities and tasks with the assurance that God is our heavenly Father who unconditionally loves us, cares for us, will never leave us, an ever-present help, guiding and enabling us.