I would argue that Hebrews 11:6 answers this question directly:
And without faith it is impossible to please God, because anyone who comes to him must believe that he exists and that he rewards those who earnestly seek him.
To be pendantic about it, God is only pleased when you have faith - i.e. you "trust in God" - and specifically, there are two things that you trust / believe in / mentally assent are true:
- That God Exists
- That he rewards people who seek Him.
Or, put possibly even more simply, God wants you to trust that he is the One you should be searching for. Not money, not power, not your own selfish desires, but Him, and Him alone. In the same way that Solomon sought wisdom, and God chose to add power, money, and all the desires of his heart, so too, God rewards those who seek God first - who trust that he is the aim for which man was made - and direct their efforts towards reaching him.
Or, as Jesus said:
Seek ye first the Kingdom of God and His Righteousness, and all these things shall be added unto you.
Fideo is Latin for Trust - it is the root from which we get 'fiduciary.' When you put your trust in a bank, you are willing to say, "I believe that you will take care of my stuff and return it to me when I need it. I trust you with my very well-being." God would demand nothing less.