We can create two linear equations relating life and love. If love is in our life, then it will be very happy. If we write it as an equation, we get LIFE+ LOVE = HAPPINESS
If we love nobody and there is no one to love us, then our life will be very horibble.If we write it as an equation, we get
LIFE-LOVE= SOROW
Adding these two equations, we get
LIFE+LOVE+ LIFE-LOVE = HAPPINESS +SORROW
i.e., 2 LIFE=HAPPINESS +SORROW
LIFE= HAPINESS/2 + SORROW/2
Source: students magazine