Thirukkural-On Virtue-True Knowledge-Kural 357

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A mind that perceives the underlying truth of all matter, and directs itself
To the fountain of all Truth, need not worry about rebirth.

The idea is that the pursuit of truth is ultimately bound to lead to final release, and that is to God himself.

The words of Christ in the New Testament are relevant in this context.

'And you will know the Truth and the Truth will make you free"(St. John 8:33)

parithiar"s words are just as effective against a different background.

'Arivin velathai thiruvadiyilae
seluthumaakil kaanbathu arivu'