In plain words
From Satya everything was created; into Satya all creation is absorbed; search as you will, where is the place without the glory of Satya? That itself is pure sattva; see it, sirs!
The inner meaning of Satya is nothing but creating living beings, giving them food, and raising and nourishing them
“Satyaṃ brūyāt, priyaṃ brūyāt, na brūyāt satyam apriyaṃ”; “Satyaṃ vada, dharmaṃ cara”: these are the chief authoritative sayings of the Veda. For all living beings born into the world, food is the very first need. Without food at all, the living being would pass away. The root source of this food is the sun. Rain falls only through the light of the sun. Crops grow only through rain. These very crops take shape as food for human beings. As the Upaniṣads have said, in every saying three principal words stand as its authority. In the same way, the word “satyamu” too has three syllables. They stand as symbols of food, hunger and satisfaction. ‘Sat’ means life; ‘yī’ means food, ‘m’ means the sun. Through this sunlight food is obtained; it gives the body nourishment and contentment and brings ease to life. Satya does not mean merely saying what is, just as it is, or speaking of what one has seen, just as one saw it. Of these three syllables the very first is ‘Sat’; that itself is life. In this very life is the hunger called ‘yī’. The sun, called ‘yam’, satisfies this hunger. In sum, Satya means life; the hunger within life; the sun that satisfies that hunger: the principle of these three is contained in Satya itself.