Leaning has to sense of putting your whole weight on something, resting on or trusting in that person or thing. With this verse, they're talking about fully trusting God. When we have an important decision to make, we sometimes feel like we can't trust anyone - not even God. I'd have to say that I am guilty of that. But god knows what is best for us. He is a better judge of what we want than even we are. We must trust him completely in every choice we make. In order to trust him, bring your decisions to God in prayer. He will make our paths straight by both guiding and protecting us. Trust him.
Another great verse about trusting God is Psalm 62:8. It says, "Trust in him at all times, O people; pour out your hearts to him, for God is our refuge." Trusting God to be our rock, salvation, and fortress will change our entire outlook on life. Trusting him will be the best decision you will ever make. God should be the picture of our trust. By entrusting ourselves to his protection and pledging our daily devotion to him, we will be kept safe. Trust him.
Jesus' words show that the way to eternal life, though unseen, is secured - as secure as your trust in Jesus. He has already prepared the way to eternal life. The only issue that may still be unsettled is your willingness to believe. Trust him.
Dear God, Help me to put my 100% trust in you. I know you're the one who does good things for me. I trust you God. Make my life yours.