act upon

But I make no doubt that you act upon principle—just principle.

And in this assurance, I will leave them, I think, to act upon their own heads.

I had grave suspicions of it all along, but I did not act upon them.

Nor fire, nor sword bring I: only this I say: Will and do; resolve and act upon your resolution.

I have an idea and if this trouble were mine I should act upon it.

Yet lest vanity should befool me, I dared not act upon suspicions.

Agesilaus resolved to act upon it, and despatched Lysander to the Hellespont.

Good philosophy this, I believe, but not a little difficult to act upon.

But he who teaches another does act upon him by some external action.

When we experience an affection, we desire to be able to act upon it.