Jesus Christ doesn’t just give us truths; he is the truth. Jesus Christ is the prophet to end all prophets. He gives us hard-copy words from God, truths on which we can build our lives, truths we have to submit to, truths we have to obey, and truths we have to build our lives on, but he himself is the truth.
There's no law that decrees when not to whinge, but you reach a certain age - 80 seems about right - when you're expected to manifest querulousness - the coffee's too hot, the boiled egg's too soft.