Luke 8:5-18

It is not enough that the fruit be brought forth, but it must be brought to perfection, it must be fully ripened. If it be not, it is as if there was no fruit at all brought forth; for that which in Matthew and Mark is said to be unfruitful is the same that here is said to bring forth none to perfection. For factum non dicitur quod non perseverat—perseverance is necessary to the perfection of a work.