I was wading in a mountain creek recently. It was easy when the sunlight shined through shallow water and I could see my foot on the rock. For the deeper water, it was dark and I couldn't see my foot or the terrain under the surface. The deeper water required taking a step of faith. To go deep, it took faith.
And so it is with God. I'm not promoting walking blindly, but walking deeply. It takes having faith in Christ with each step. In Genesis 15:6 (NASB), the Scripture says the following:
Then he [Abram] believed in the LORD; and He [LORD] credited it to him as righteousness.
That's faith. That's walking deeply.
Specifically, it was Abram's obedience that was his faith in action. Consider Hebrews 11:8 (NASB):
By faith Abraham, when he was called, obeyed by going out to a place which he was to receive for an inheritance; and he left, not knowing where he was going.
One of my late father's favorite hymns was Trust and Obey. Trust is faith in God. And it goes hand-in-hand with obedience. So we don't just take any step, but one that is obedient to God. We find what He says in the Bible. From the Word of God and the work of the Holy Spirit, we can see. Specifically, we can see the Rock -- Jesus Christ -- and we can build our lives on Him. That is how we can walk in faith. That is how we can walk deeply. Consider the words of Jesus in Matthew 7:24-27 (ESV):
Everyone then who hears these words of mine and does them will be like a wise man who built his house on the rock. And the rain fell, and the floods came, and the winds blew and beat on that house, but it did not fall, because it had been founded on the rock. And everyone who hears these words of mine and does not do them will be like a foolish man who built his house on the sand. And the rain fell, and the floods came, and the winds blew and beat against that house, and it fell, and great was the fall of it.