How translations vary
Here are some verses from Isha Upanishad as translated by Sri Aurobindo, Swami Gambhirananda and Hari Prasad Shastri.
Shri Aurobindo originated a yoga of becoming which he called Integral Yoga.
Swami Gambhirananda was associated with Ramakrishna Mission
Hari Prasad was a God-Realised Adwaita Vedantin in the school of Shankara.
The point of the Gita and Upanishads is that they are applicable in our lives and that they form a basis for going deeper in feeling, visualisation and meditation.
Verse 1
All this is for habitation by the Lord, whatsoever is individual universe of movement in the universal motion. By that renounced thou shouldst enjoy; lust not after any man’s possession. Aurobindo
Om. All this-whatsoever moves on the earths should be covered by the Lord. Protect (your Self) through that detachment. Do not covet anybody’s wealth. (Or-Do not covet, for whose is wealth?) Gambhirananda
The whole universe, the movable and the immovable, is to be realised as ‘being supported on the Over-Lord (Isha). Enjoy by renouncing it; do not covet the property of another. Hari Prasad Shastri
Verse 6
But he who sees everywhere the Self in all existences and all existences in the Self, shrinks not thereafter from aught. Aurobindo
He who sees all beings in the Self itself, and the Self in all beings, feels no hatred by virtue of that (realization). Gambhirananda
He who sees all beings within his Self, and his Self in all beings, does not despise any creature. Hari Prasad Shastri
Verse 7
He in whom it is the Self-Being that has become all existences that are Becomings, for he has the perfect knowledge, how shall he be deluded, whence shall he have grief who sees everywhere oneness? Aurobindo
When to the man of realization all beings become the very Self, then what delusion and what sorrow can there he for that seer of oneness? (Or In the Self, of the man of realization, in which all beings become the Self, what delusion and what sorrow can remain for that seer of oneness?) Gambhirananda
When a man realises consciously that all beings are his own Self, there is no further grief and delusion for him because he is established in the unity of the individual and the cosmic soul. Hari Prasad Shastri
Verse 16
O Fosterer, O sole Seer, O Ordainer, O illumining Sun, O power of the Father of creatures, marshal thy rays, draw together thy light; the Lustre which is thy most blessed form. Aurobindo
O thou who art the nourisher, the solitary traveller, the controller, the acquirer, the son of Prajapati, do remove thy rays, do gather up thy dazzle. I shall behold by thy grace that form of thine which is most benign. I am that very Person that is yonder (in the Sun). Gambhirananda
O deity of the sun who travellest alone, O dispenser of justice, O sun, O progeny of Prajapati, disperse thy rays and focus thy light in thy disc! Let me see thy most blissful form! O, I see, I see the spirit which shines in thee! That am I! That am I! Hari Prasad Shastri
Verse 18
O god Agni, knowing all things that are manifested, lead us by the good path to the felicity; remove from us the devious attraction of sin. To thee completest speech of submission we would dispose. Aurobindo
O Fire! O god ! Knowing, as thou do, all our deeds, lead us by the good path for the enjoyment of the fruits of our deeds; remove from us all crooked sins. We offer thee many words of salutation. Agne, O Fire; deva, O god; vidvan, knowing; visvani vayunani. Gambhirananda
O Agni, O omniscient Lord, lead us on the road to spiritual bliss and enjoyment of shanti. Destroy the crookedness of our hearts in order to enable us to offer our real salutations unto Thee. Hari Prasad Shastri
Hari Prasad Shastri says verse 16 is to be meditated upon daily.
According to the holy Shastra the sun is not a dead mass; nothing is dead, not even rocks. In order to have a feeling of unity with the ultimate reality, the yogi by meditation identifies himself with the spirit which lends light and brilliance to the sun. By meditating on the sun as the light reflecting the supreme spirit which is one and the same in all hearts, the yogi transcends all material and mental limitations. This meditation, if done in a pure heart free from agitation, lifts the individual soul to the highest spiritual level beyond all duality and even beyond unity. This is the state of nirvana, the goal-of-yoga. It is the natural state of the spirit of man. It is not subject to achievement but to discovery. What happens then is described by Paramahansa Rama Tirtha Swami: “All eyes are my eyes, all ears my ears; my soul is the soul of all”. This is the highest form of prayer.