Find that pursuit that will energize you, consume you, become an obsession. Each day, you must rise with a restless enthusiasm. If you don't, you are working.
I found him well educated, with unusual powers of mind, but infected with misanthropy, and subject to perverse moods of alternate enthusiasm and melancholy.
Jean Prouvaire was timid only in repose. Once excited, he burst forth, a sort of mirth accentuated his enthusiasm, and he was at once both laughing and lyric.