The skin of the Prophet's feet cracked...

`Aishah (May Allah be pleased with her) said: The Prophet (SAWS) would stand (in prayer) so long that the skin of his feet would crack. I asked him, "Why do you do this while your past and future sins have been forgiven?'' He said, "Should I not be a grateful slave of Allah?''

[Al-Bukhari and Muslim]

Commentary: The more one is rewarded by Allah, the greater the proportion of one's gratitude of Allah for His Benevolence should be. The best form of doing so is that one should not only be highly obedient and dutiful in the performance of the obligations but also add maximum voluntary prayers to them.

Be like a brick...

Allah's messenger SAWS said:
A believer is like a brick for another believer, the one supporting the other.
[Sahih Muslim]

The similitude of believers in regard to mutual love, affection, fellow-feeling is that of one body; when any limb of it aches, the whole body aches, because of sleeplessness and fever.
[Sahih Muslim]

Even when you stumble upon the road, your sins are forgiven

When this verse was revealed: "Whoever does evil will be requited for it", and when this was conveyed to the Muslims they were greatly upset.

Thereupon Allah's Messenger (may peace and blessings be upon him) said:
"Be moderate and stand firm in trouble that falls to the lot of a Muslim (as that) is an expiation for him; even stumbling on the path or the prickin of a thorn (are an expiation for him)."

[Sahih Muslim]

If you're the first one to abuse some one...

Allah's messenger SAWS said

When two persons indulge in hurling (abuses) upon one another, it would be the first one who would be the sinner so long as the oppressed does not transgress the limits.

[Sahih Muslim]