A good example is far better than a good precept.
— Dwight L. Moody

Example is the best precept.
Aesop precepts quote

Precept guides, but example draws.
— Proverbs

The road to learning by precept is long, but by example short and effective.
— Marcus Annaeus Seneca Seneca The Elder

Examples is more forcible than precept. People look at my six days in the week to see what I mean on the seventh.
— precepts quotation by Robert Cecil