Q: Any command given by the Messenger of Allah (peace be upon him) indicates obligation and duty. However, there is a Hadith whose apparent meaning contradicts the Hadith narrated by
(may Allah be pleased with him):
When I command you to do anything, do of it as much as you possibly can.
How can a Muslim reconcile these two Hadiths?
The basic rule concerning any commands of the Prophet (peace be upon him) is that they denote obligation, unless otherwise indicated. However, fuflillment of obligation is in accordance with one's ability, because Allah (Exalted be He) says:
So keep your duty to Allâh and fear Him as much as you can
This is also supported by the Hadith mentioned in the question. (Part No. 4; Page No. 8) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.