Without the Shabad, God is not obtained and life wastes away in vain. (Guru Granth Sahib, 31)

O mind, why have you gone insane? Don't you know that your life is decreasing, day and night? Your life is made worthless with greed. That body, which you believe to be your own, and your beautiful home and spouse, none of these is yours to keep. See this, reflect upon it and understand. You have wasted the precious jewel of this human life; you do not know the Way of the Lord of the Universe. You have not been absorbed in the Lord's Feet, even for an instant. Your life has passed away in vain! Says Nanak, that man is happy, who sings the Glorious Praises of the Lord's Name. All the rest of the world is enticed by materialistic things; they do not obtain the fearless state. (Guru Granth Sahib, 220)

O mortal, what will your condition be? In this world, you have not listened to the Name of God. You are totally engrossed in corruption and sin; you have not turned your mind away from them at all. You obtained this human life, but you have not remembered the Lord in meditation, even for an instant. For the sake of pleasure, you have become subservient to your woman, and now your feet are bound. Servant Nanak proclaims that the vast expanse of this world is just a dream. Why not meditate on the Lord? Even Maya is His slave. (Guru Granth Sahib, 1352)