The key to wisdom is this - ...

The key to wisdom is this - constant and frequent questioning, for by doubting we are led to question and by questioning we arrive at the truth.
The key to wisdom is this - constant and frequent questioning, for by doubting we are led to question and by questioning we arrive at the truth.
 Peter Abelard

More phrases

If one does not know to which port one is sailing, no wind is favorable.
What a distressing contrast there is between the radiant intelligence of the child and the feeble mentality of the average adult.
We are masters of the unsaid words, but slaves of those we let slip out.
I have always found that mercy bears richer fruits than strict justice.
A lie gets halfway around the world before the truth has a chance to get its pants on.

Quotes from the same author

The beginning of wisdom is found in doubting; by doubting we come to the question, and by seeking we may come upon the truth.
 Peter Abelard
The men who abandon themselves to the passions of this miserable life, are compared in Scripture to beasts.
 Peter Abelard
Nothing can be believed unless it is first understood; and that for any one to preach to others that which either he has not understood nor they have understood is absurd.
 Peter Abelard
Are you not moved to tears and bitter compassion, when you behold the only Son of God seized by the most impious, dragged away, mocked, scourged, buffeted, spit upon, crowned with thorns, hung upon the infamous cross between two thieves, finally in such a horrible and execrable manner suffering death, for your salvation and that of the world?
 Peter Abelard
God considers not the action, but the spirit of the action.
 Peter Abelard