'Adhere to righteousness even though you will not be able to do all the good acts

It was narrated that Thawban, may Allah be pleased with him, said:"The Messenger of Allah, may the peace and blessings of Allah be upon him, said: 'Adhere to righteousness even though you will not be able to do all the good acts. Know that the best of your deeds is the prayer and that none but a believer maintains his state of ablution.'"