“How often does a man ruin his disciples* by remaining always with them! When men are once trained, it is essential that their leader leave them, for without his absence they cannot develop themselves. Plants always remain small under a big tree.”
― Swami Vivekananda
*and, may we add, how often does a disciple ruin his chances at reaching The Goal by remaining too long with the guru (and expecting him/her to do their work for them).