In my Psalter journey, I underlined every time the word "trust" was used. If this is the way God has desired His people to relate to Him throughout history [Hebrews 11], I figured the OT's hymnbook was a good place to discover the nature of true faith/trust.
The word itself is used close to 50 times in Psalms. Out of its 50 uses, YHWH or YHWH's promises are generally the object or aim of the faith/trust exhibited. In fact, it is only used negatively 7-8 times [i.e. Ps 44.6: "For not in my bow do I trust"].
Thus, as Paul says that idols are not real gods in 1 Cor 8, so faith/trust in other things apart from YHWH is not really faith/trust at all. It has the appearance or the sense of faith/trust, but not the essence. Truly trusting can only be done toward one Being. Any faith/trust between humans is too mingled with our selfish ends even if it appears to be serving or sacrificial. However, believing and trusting God is the grounds for us to have a kind of sincere honesty among the people of God.
Individually and corporately walking in this faith/trust is God's desire for His people. First, vertically. And in turn, horizontally.
Those who trust in YHWH are like Mount Zion, which cannot be moved, but abides forever [Ps 125.1].