Thus says the LORD:
“Cursed is the man who trusts in man
And makes flesh his strength,
Whose heart departs from the LORD.
For he shall be like a shrub in the desert,
And shall not see when good comes,
But shall inhabit the parched places in the wilderness,
In a salt land which is not inhabited.
“Blessed is the man who trusts in the LORD,
And whose hope is the LORD.
For he shall be like a tree planted by the waters,
Which spreads out its roots by the river,
And will not fear when heat comes;
But its leaf will be green,
And will not be anxious in the year of drought,
Nor will cease from yielding fruit. (Jeremiah 17:5-8)
God alone is completely trustworthy. The land of Israel is dry in many places. But it has streams called wadis. During the rainy season, they fill with water, but during the summer and during droughts they dry up. But beneath the parched soil, the water is still there if you dig for it. Trees planted near such wadis will never lack for water, regardless of the changing seasons.
Because we can see people, we easily put our faith in them, despite the fact that people are flawed, inconsistent, and often fail to meet their well-intentioned obligations—like the water in a wadi. Likewise, we will fail ourselves: we will become guilty of the one thing we could never imagine ourselves being guilty of. We will lose the job that seemed so perfect. Our bodies will age, we will grow sick, and our memories will fail us. The other person in the race is actually faster than us after all.
God never tires, never gets sick, never has a short temper. The events of his day never ruin his mood or turn him grumpy.
God will always be ready for us, like the deep water; he is the one person that we can always rely on.