A noteworthy derivation about life, The Supreme and meditation, interpreted from Skanda Purana:
The Thumb stands apart from the rest. It is not in the same group as the other four fingers. Without the Thumb, the other four fingers cannot be totally functional . Hence the Thumb represents The Almighty.
The Fore finger or the Index finger signifies Life. Middle finger signifies Ego and Pride. The Ring finger signifies karma, dead or feat (can be good deeds or bad deeds) – it is the process of doing. The small finger or Pinky signifies Maya or Illusion.
God creates us and we all want to go back to bad through Moksha Mukthi – highly possibly only through good deeds and meditation. So, one has to keep the ego, bad deeds and illusions away from one’s life. Chin Mudra in Yoga is the touching of Index finger-tip with the Thumb – “life” joining with “God” – this is the basic pose for meditation.
So, when one meditates, we keep the Ego, Karma and Illusion away. This is when you become one in peace.
Some more tit bit on Ring finger: This is the finger associated with Apollo, the Greek God of Love and romance. This finger is also associated with the moon. The Romans believed the vein in the Ring finger on the left hand ran directly to the heart – “Vein of Love”. This is why wedding or engagement rings are worn on the left hand Ring finger.