John F. Kennedy said this quote

The Chinese use two brush strokes to write the word 'crisis.' One brush stroke stands for danger; the other for opportunity. In a crisis, be aware of the danger--but recognize the opportunity.

~ John F. Kennedy

The rights of every man are diminished when the rights of one man are threatened.

~ John F. Kennedy

A man may die, nations may rise and fall, but an idea lives on. Ideas have endurance without death.

~ John F. Kennedy

Let us never negotiate out of fear. But let us never fear to negotiate.

~ John F. Kennedy