When we build, let us think that we build forever.
The step between practical and theoretic science, is the step between the miner and the geologist, the apocathecary and the chemist.
Walk while ye have the light, lest darkness come upon you.
Every increased possession loads us with a new weariness.
I believe the first test of a truly great man is in his humility.
The finer the nature, the more flaws it will show through the clearness of it; and it is a law of this universe that the best things shall be seldomest seen in their best form.