They grow up to replace us.They replace us to carry forward the mission left uncompleted.They replace us for now they are better navigators to take the mission forward.Ageing is a wonderful process for it takes you to a newer world always.So welcome it.F or it only, you see the beautiful sights as this.It makes me feel you never die for your blood and flesh continues as your children on the earth.That is why they say 'atma' is 'abinaswar'.