Immanuel Kant said this quote

One who makes himself a worm cannot complain afterwards if people step on him.

~ Immanuel Kant

Two things fill the mind with ever-increasing wonder and awe, the more often and the more intensely the mind of thought is drawn to them: the starry heavens above me and the moral law within me.

~ Immanuel Kant

Enlightenment is man's release from his self-incurred tutelage. Tutelage is man's inability to make use of his understanding without direction from another. Self-incurred is this tutelage when its cause lies not in lack of reason but in lack of resolution and courage to use it without direction from another. Sapere aude! 'Have courage to use your own reason!'- that is the motto of enlightenment.

~ Immanuel Kant

Thoughts without content are empty, intuitions without concepts are blind.

~ Immanuel Kant