There is an old saying "well begun is half done"-'tis a bad one. I would use instead-Not begun at all 'til half done.
John KeatsThis Grave contains all that was Mortal of a Young English Poet Who on his Death Bed in the Bitterness of his Heart at the Malicious Power of his Enemies Desired these words to be engraved on his Tomb Stone "Here lies One Whose Name was writ in Water."
John KeatsPraise or blame has but a momentary effect on the man whose love of beauty in the abstract makes him a severe critic on his own works.
John Keats