Once Guru Amar Das ji was in deep, deep meditation. His daughter, Bibi Bhani, saw that the platform he was on was going to break and he would be jolted awake when that happens. She put her hand in the way. Her hand got cut really bad. When Guru ji saw her pain and devotion he granted her a blessing. She asked that the Guruship always stay in her family line. The rest of the Gurus were descendants of Bibi Bhani and Guru Ram Das.
Once Guru Nanak went on a long walk with all his dicsiples. As they were walking some people found money on the ground and they went home. After a long, long distance only two Sikhs were left. Guru Nanak told them to eat a dead body. One Sikh couldn't do it, but Bhai Lehna humbly obeyed. Lehna's devotion surpassed all tests. He was so devoted he was like an 'ang' a limb of the Guru.
One time Guru Gobind Singh told one of his soldiers to climb up a huge tree that was near by. He told him to go up there and look for a Pipal tree. When the Pipal tree was found Guru ji told him that one day the Pipal tree will be even higher that the huge tree above it. "When it gets that high than the Khalsa will flourish in this world." The Pipal tree grows very slow and as it takes over the other tree surely the Khalsa will spread in the kindest of spirits.
Once there was a piece of clay that a potter had. The potter worked this clay all kinds of ways and the clay kept telling him "Stop it, that hurts!" The potter didn't stop and in the end that piece of clay turned in to a beautiful cup. When he was finished the cup realized why the potter put him through all that stuff. We are like that cup: God has made us beautiful as we are.
The emperor Jahangir had heard rumors of Guru Hargobind and decided to pay him a visit. He found the Guru to be wise, friendly and brave. Once they were hunting together and a tiger jumped out to attack the emperor. All of his royal soldiers were afraid and didn't do anything. The Guru himself got off his horse and cut the tiger in half, saving the emperors life.
A king with his army visited Guru Gobind Singh ji. The king obviously thought his army was superior to the Guru's so the Guru decided to teach him a kind lesson. Guru ji asked his Sikhs to use themselves as targets to test a new gun he had received. Two Sikhs wanted so much to give their lives for the Guru they fought over who would be the target. The proud king was greatly humbled.