Since my dad died, I can't stop thinking about my own death — it has crept into every ordinary evening.

Listen to what the 3 a.m. voice actually says. 'One day I will end.' The verse does not argue with 'one day'. It does not promise the body a reprieve, and it does not tell the frightened son to think about something else. It goes for the other word. Who is this 'I' that will end?

Ayam — 'this one' — is the Gita's name for the one who lives in the body, the dehī (देही). Everything the verse says, it says about that one, and it says the two things that matter twice. It is not born: na jāyate, and then again, ajaḥ (अजः), unborn. It does not die: na mriyate, and then again, na hanyate — not slain, even when the body is slain. The tradition that explains this verse points out why the doubling. Of the six changes a body goes through — it is born, it exists, it changes, it grows, it decays, it perishes — birth and death are the two chief ones, so the Gita denies each of them twice.

Your father's body went through all six. That is the biography you grieved, and the one you are now counting down in your own case. The verse says the one who was watching that biography from inside — and the one watching yours — has no biography at all.

The second line gives that one four names, and they are worth learning, because the fear will come back and you will want something to say to it. Ajaḥ — unborn: it has no birthday, so it has no countdown. Nityaḥ (नित्यः) — eternal: the body and the senses lose their strength and decay; this does not decay in the least. Śāśvataḥ (शाश्वतः) — everlasting, constant, changeless. Purāṇaḥ (पुराणः) — ancient, primeval: older than the body it is wearing, older than the one your father wore.

Then the hardest and most honest phrase in the verse: hanyamāne śarīre — when the body is slain. Not 'if'. The Gita is not a denial of death. It looks straight at the thing you are afraid of, grants it entirely, and then says what it does not reach.

Be honest about how hard this is to feel. You can agree with every word and still notice your heartbeat in the dark. Arjuna heard it and kept arguing for sixteen more chapters. The verse is not a switch. It is a correction you make again and again, each time the fear uses the wrong word for you.

First, catch the grammar. When the voice says 'one day none of this', answer it precisely: 'The body will end. I am not told that I will.' Say it in those words, even if you do not yet believe the second half. The fear lives on an unexamined 'I'; the practice is to examine it.

Second, do the two-column exercise once, on paper. Left column: everything about you that has changed since you were eighteen — face, strength, opinions, the people in your life. Right column: whatever has been watching all of it change and is still here, unchanged, reading this. The right column is short. It is also what the verse is talking about.

Third, give the body its appointment. The mole, the heartbeat, the tiredness — book the check-up you have been photographing instead of making. Let a doctor carry what a doctor should carry. Fear grows in the gap between noticing and acting; close the gap.

Fourth, learn the four words — ajaḥ, nityaḥ, śāśvataḥ, purāṇaḥ — and say them once at bedtime. Not as a spell. As a reminder of what you are calling 'I' when you lie there afraid.

Fifth, tell one person. The shame of being thirty-eight and frightened of the dark is itself most of the weight, and it only survives in silence. Say it to someone who loved your father too. You will find you are not the only one doing the arithmetic.