“The busier we are, the more acutely we feel that we live, the more conscious we are of life.”

“We are not rich by what we possess but by what we can do without.”

“We are enriched not by what we possess, but by what we can do without.”

“Two things fill the mind with ever new and increasing admiration and awe, the oftener and more steadily we reflect on them: the starry heavens above and the moral law within.”

“In all judgements by which we describe anything as beautiful, we allow no one to be of another opinion.”

“For if we regard space and time as properties that must, as regards their possibility, be found in things in themselves, [...] then we really cannot blame the good Bishop Berkeley for degrading bodies to mere illusion. Nay, even our own existence, which would thus be made dependent on the self-subsistent reality of a non-entity such as time, would, along with this time, be changed into mere illusion - an absurdity of which hitherto no one has been guilty.”

“The schematicism by which our understanding deals with the phenomenal world ... is a skill so deeply hidden in the human soul that we shall hardly guess the secret trick that Nature here employs.”