THE PRACTICE OF THE TRUTH
Whatever one thinks of unceasingly [until one’s death], by the power of such thinking one becomes that. [Since one will therefore become Self if one always meditates upon Self] if with great love one practises [Self-attention] and [thereby] knows the nature of the attachments [‘I’ and ‘mine’] and abides in Self so that the attachments are destroyed, the disease [of ajnana] which causes birth [and death] will not approach one.
in “Guru Vachaka Kovai” - The Garland of Guru’s Sayings, by Sri Muruganar, Chapter 60, Practice (Nididhyasana) - Verse 750
It is said in scriptures that one becomes whatever one thinks of at the time the life leaves the body. Therefore, in this verse it is instructed that those who want Liberation should think about Self in order to set aside other thoughts, which are the cause of rebirth. Since death can come at any time, any second of our life may be the second prior to death. Therefore, it is Sri Bhagavan’s opinion that meditation on Self should be done every second.