One of Spider-Man's biggest characteristics is the ability to "sling" webs. He can use them to distract villains, wrap up criminals, and probably even to pick up girls (literally).
Most notably, though, is Spider-Man's ability to use these webs to carry him across Manhattan. The Spiderman movie makes this revelation seem pretty comical, but there is still something to it. Daily, hourly, perhaps even minutely, Spider-Man depends on the strength of his web slinging in order to carry his whole body through the air. He cannot fly and would be squashed (like a bug) on impact if his webbing would suddenly give way.
Spider-Man does not only trust that his webbing exists. He daily uses it. He trusts that it will continue to be there to support him and to carry him through any predicament that he may be in.
"Trust in the Lord with all your heart,
and do not lean on your own understanding."
It is one thing to say, "Yeah, I believe God exists. I have faith that he is there." And a completely different thing to say, "Yeah, I believe in God. I have faith in him." The difference is in the understanding of the trust behind this faith.
Do you only "trust that God exists" or do you specifically "trust in him?" Do you just know God is real, yet distance yourself from him? Or, do you lean on him, knowing that he will be there to support you and carry you through any predicament that you may find yourself in?
I encourage you to take the jump. Leap in faith. Know that he will be the web strong enough to carry you through.