The ancient hermits of India blissfully recite-
Sarirendriya satwa atma sanjoga dhari jivitam,
Nityagascha anubandhascha paryayaih ayu uchhyate.
The time period when the body, mind, soul, sense organs remain integrated and composed is called Ayu or Life. All the words like sarira, Indriya, Satwa, Atma, Sanjoga, Dhari, Jivita, Nityaga, Anubandha are synonymous to Ayu.
They again recite-
Ayuh Kamayamanena Dharmartha sukha sadhanam
Ayurvedepodesheshu, vidheyah paramadarah.
The objectives of life are Dharma, Artha, Kama and Moksha. All these things are possible only when somebody will be having a long and healthy life. For that the person should have interest in Ayurveda.