1. too soon - Adverb
2. too soon - Interjection
before the usual time or the time expected
Source: WordNetSome people will never learn anything, for this reason, because they understand everything too soon. Alexander Pope
Gentlemen, when the enemy is committed to a mistake we must not interrupt him too soon. Horatio Nelson
Old hands soil, it seems, whatever they caress, but they too have their beauty when they are joined in prayer. Young hands were made for caresses and the sheathing of love. It is a pity to make them join too soon. André Gide
The child who died too soon was always beautiful and intelligent. Japanese Proverb
Better reap two days too soon than one too late. Dutch Proverb
We grow too soon old and too late smart. Pennsylvania Dutch Proverb