singleness

With the human race the love sentiment does not usually display the singleness of energy shown among the lower animals.

She recognized more fully the purity and singleness of his life.

She sealed herself over and drove ahead with the singleness of purpose, the exclusions, of any tormented thing.

What distinguished him was his open-mindedness, his essential goodness, his singleness and simplicity of aim.

A steady climb with unflagging zeal and singleness of purpose always win out.