Life is nothing but nothing but thoughts generated from brain, Happiness,unhappiness,like dislike, anger, fear, Greedy etc, Refer Geetha -2.14
When you are free from these thoughts ( Yoga - Padhanjali suthra 1.2) You can realise athma - Padhanjali Suthra - 1.3
Athma is god dwells in one's heart - Kada upanishad - 2.1.7, Dhaithriya uapanishad 1.6.1, Aham Phramasmi - Pragadharanya Upanishad - 1.4.9-10
Combining all these You can realise God You have to kill/sacrifice/remove thoughts.
Thoughts are covered by three malas (Dirt) Ego (Anava) Greediness (Kanmam) Illusion (Maya).
Coconut is covered by three 1. Fibre( Ego), 2. Pith (Greediness)- these two are in combined state. 3. Shell (Maya) - Very hard to remove. Inside white kernel(Brain- which is having millions of thoughts Like coconut is having milk/Oil)
To realise God sacrifice your thoughts- Remove Fibre,Pith and Break shell and submit the white kernel of the coconut to God, That is thoughts about God.