Dhu’n-Nun al-Misri, may Allah be merciful to him said:
Rajab is for abandoning destructive things, Sha`ban is for performing much acts of obedience, and Ramadan is for the expectation of noble miracles.
Whoever does not abandon destructive things, does not perform acts of obedience, and does not expect noble miracles, then he is among the charlatans worse than rubbish.
He may Allah be merciful to him, also said:
Rajab is the month of planting the seeds, Sha`ban is the month of watering them, and Ramadan is the month of harvesting. One can only harvest what has been planted as one can only reap what is sown. Whoever forfeits the planting of seeds and tending to them will regret when the day comes for harvesting. His conjectures will fall far below the evils of his ending
– Sultan al-Awliyah Shaykh ‘Abdul Qadir al-Jilani in his al-Ghunyat Talibi Tariq al-Haqq –