If a preacher desires his preaching to be effective on people, he should practice what he preaches. One who says what he does not do can hardly expect to succeed in his mission.
Actions speak louder than words.
God s Messenger, upon him be peace and blessings, was the living embodiment of his mission. He was the foremost in practising Islam, in devotion to God, in servanthood to Him. It usually happened that one who saw him did not feel the need to see any other proofs to believe in his Prophethood. 24 Those who believed in him in his time were not foolish or unreasonable people. Among them were men who, like the first four caliphs, namely Abu Bakr, Umar, Uthman and Ali, may God be pleased with them all, administered a very great state.