The second life begins when one is delivered into the world and ends when one dies and returns to earth. This is the phase of life when a person is held accountable for their actions. This life is a test of our actions and behavior but also a chance to grow close to Allah.

"O humanity! Should you be in doubt concerning the Resurrection, then know that we created you from dust, then from seed, then from a clot, then from a lump of flesh shapely and shapeless, that We may make it clear for you. And We cause what We will to remain in the wombs for an appointed time." [22:5] 

When the baby is in the mother's for about 4 months, "God sends an angel to blow a spirit into the body. The angel is commanded to write four words: his provision, his lifespan, his deeds, and whether he will end up as unhappy or joyful." 

Childhood 'The pen is withheld from recording the deeds of three people: a child, a sleeper until he wakes, and someone without sound mind.' [hadith] However, it is the parents duty to teach them Islamic manners and how to worship Allah Most High. Everything a child does of good deeds, goes in the good deed scrolls of the parents.

Youth: Youth is a time of learning and gaining in merit in one's behavior. Young people find interest in many things, but the best of them are those who turn to Allah and spend their youth in closeness to Allah. One of the seven kinds of people shaded on the Day of Judgment are those who spend their youth in service to Allah Most High. 

Maturity: When a person reaches middle age, it becomes clear if they are intended for good or evil. Some scholars have said that it is at the age of forty that refers to Allah's words, "Did we not grant you a life long enough for him who reflects to reflect therein? and a warner has come to you." [35:37]  

When Imam al-Shafi'i, may Allah have mercy on him, turned forty he began to walk with a staff. When he was asked about this practice, he used to say, "To remind myself that I am a traveler."