“Whoever despises the high wisdom of mathematics nourishes himself on delusion and will never still the sophistic sciences whose only product is an eternal uproar.”

“A diamond is just a lump of coal that stuck to its job.”

“Make your work to be in keeping with your purpose”

“Nature is constrained by the cause of her laws which dwell inborn in her. Variant: Nature is constrained by the order of her own law which lives and works within her.”

“Every obstacle is destroyed through rigor.”

“I am declinedInto the vale of years.”

“What should we speak of When we are old as you? when we shall hear The rain and wind beat dark December? how, In this our pinching cave, shall we discourse The freezing hours away?”

“My way of lifeIs fall'n into the sear and yellow leaf.”