Peace be on you.
Determination in the path of God is requirement. There are many tribulations in that journey. Generally, everyone is happy in good times but the determined person is the one who stands firm in the face of troubles. The perfect leader, the Holy Prophet (peace and blessings of Allah be on him) faced all kinds of resistance when he called the people toward Unity of God and His message of morality. He endured all troubles for the sake of all humanity so that people should know God and become righteous in wordly and spiritual paths. The benevolence of Holy Prophet (p.b.u.h.) has to be met with thankfulness. Thus sending salutation and pray for Holy Prophet (peace and blessings of Allah be on him) is a must to do for believers. It attracts mercy of Allah and one find ease to follow their holy master (p.b.u.h.). To be able to follow the divine teaching, internal strength is needed. Seeking cover of God with repentance brings that help. All these blessed ways illumine the seekers on the path of their Lord, explains the promised messiah, the Mahdi.
Ref: Friday sermon by Holy Khalifah at alislamDOTorg