Knowledge in youth is wisdom in age.

Learning acquired early in life can support sound judgment later, as experience, reflection, and good judgment give earlier knowledge practical depth and perspective.

The saying commends education and curiosity in younger years as a long-term resource. Its broad contrast between youth and age is proverbial, not a claim that every older person is wise.

Use it to encourage early study, skill-building, or intellectual curiosity when stressing benefits that may become clearer with maturity. It suits reflective or educational advice and should not suggest that age alone makes a person wise.