My religion consists of a humble admiration of the illimitable superior spirit who reveals himself in the slight details we are able to perceive with our frail and feeble mind.
— Albert Einstein

How frail the human heart must be --a mirrored pool of thought...
Sylvia Plath frail quote

Adversities do not make a man frail. They show what sort of man he is.
— Thomas Kempis

Vagueness and procrastination are ever a comfort to the frail in spirit.
— John Updike

Be as a bird perched on a frail branch that she feels bending beneath her, still she sings away all the same, knowing she has wings.
— Victor Hugo