Treat every moment as your last. It is not preparation for something else.
You can trust math…. Quantities and their relation. Rates of change. The vital statistics of God or equivalent. When all else fails. When the boulder’s slid all the way back to the bottom…. When you do not know your way about. You can fall back and regroup around math. Whose truth is deductive truth. Independent of sense or emotionality. The syllogism. The identity. Modus Tollens. Transitivity. Heaven’s theme song. The nightlight on life’s dark wall, late at night. Heaven’s recipe book…. What it is is: listen: it’s true.
You teach people how to treat you by what you allow, what you stop, and what you reinforce.