Affection, mistress of passion, sways it to the mood of what it likes or loathes. — William Shakespeare
My only master and my only mistress are the facts and objectivity. I have no others. — Vincent Bugliosi
Science is like a love affair with nature; an elusive, tantalising mistress. — Vilayanur S. Ramachandran
My works are the issue of simple and plain experience which is the true mistress. — Leonardo da Vinci
Truth is a glorious but hard mistress. She never consults, bargains or compromises. — Aiden Wilson Tozer