He is the bridge of the Immortal. Hail to you that you may cross beyond the sea of darkness. We find Arjuna, prince of India, the possessor of a wonderful bow called Gandiva, the gift of the gods. None but its owner could string it, and in war it spread terror in the ranks of the enemy. Arjuna was a wonderful archer too.
Archery is a practice that symbolizes concentration.
There is the archer, the arrow, the bow, and the target to be hit. To reach the mark it is necessary to concentrate the mind, the eye, and the body upon many points at once, while at the same time the string must be let go without disturbing the aim. The draw of the string with the arrow must be even and steady on the line of sight, and when grasp, draw, aim, and line are perfected, the arrow must be loosed smoothly at he moment of full draw, so that by the bow's recoil it may be carried straight to the mark. So those who truly seek wisdom are archers trying to hit the mark. This is spiritual archery, and it is to this sort that the verse from the Mundaka Upanishad refers.