Matthew Poole and continuators on 1 Peter 1:4

4 To an inheritance incorruptible , and undefiled, and that fadeth not away , reserved in heaven for you .

So eternal Life is called, Ephes. 1.18. and elsewhere, as being given not as Wages to Hirelings, but as an Inheritance to Children born of God, and adopted to him.

Immortal, everlasting, which being once possessed, cannot be taken away, nor pass over to others.

Always retains its Vigour, and Gratefulness, never causes Weariness or Satiety in them that possess it. It seems to be a Metaphor taken from Flowers, probably the Amarantus (the very word here used) which still keeps its Freshness and Vertlure, without any Decay or withering.

Laid up, Col. 1.5. and 2 Tim. 4.8. secured for the Heirs, tho not yet possessed by them.

And therefore safe, and out of the reach of Enemies. This is opposed to the uncertain Condition of earthly Possessions, such as Canaan was.

Margin, for us, viz. whom God hath begotten again: or if we read it, as in the Text, for you, the Apostle may change the Person in order to his Exhortation.

Both as being pure in it self, and having nothing to offend them that enjoy it; and likewise as being incapable of any Pollution, or Defilement contrary to what is said of the Land of Canaan, the earthly Inheritance of the Israelites, Jer. 2.7. Ezek. 36.17.

Marginal references: Or, for us.