यु॒ञ्जते॒ मन॑ उ॒त यु॑ञ्जते॒ धियो॒ विप्रा॒ विप्र॑स्य बृह॒तो वि॑प॒श्चितः॑ ।
वि होत्रा॑ दधे वयुना॒विदेक॒ इन्म॒ही दे॒वस्य॑ सवि॒तुः परि॑ष्टुतिः ॥ Rig Veda 5.81.1
Men illumined yoke their mind and they yoke their thoughts to him who is illumination and largeness and clear perceiving. Knowing all phenomena he orders, sole, the Energies of the sacrifice. Vast is the affirmation in all things of Savitri, the divine Creator.
यस्य॑ प्र॒याण॒मन्व॒न्य इद्य॒युर्दे॒वा दे॒वस्य॑ महि॒मान॒मोज॑सा ।
यः पार्थि॑वानि विम॒मे स एत॑शो॒ रजां॑सि दे॒वः स॑वि॒ता म॑हित्व॒ना ॥ Rig Veda 5.81.3
In the wake of his march the other gods also reach by his force to the greatness of the Divinity. He has mapped out the realms of earthly light by his mightiness,– the brilliant one, the divine Creator.
Sri Aurobindo says about Savitri as follows:
But who, then, is Surya, the Sun, from whom these rays proceed?
He is the Master of Truth, Surya the Illuminator, Savitri the Creator,
Pushan the Increaser. His rays in their own nature are supramental
activities of revelation, inspiration, intuition, luminous
discernment, and they constitute the action of that transcendent
principle which the Vedanta calls Vijnana, the perfect knowledge, the
Veda Ritam, the Truth. But these rays descend also into the human
mentality and form at its summit the world of luminous intelligence,
Swar, of which Indra is the lord.
Rig Veda 1.164.46 says as follows:
इन्द्रं मित्रं वरुणमग्निमाहुरथो स दिव्यो सुपर्णो गरुत्मान् ।
एकं सद्विप्राः बहुधा वदन्ति अग्निं यमं मातरिश्वानमाहुः ॥
They called him Indra, Mitra, Varuṇa, Agni; and he is heavenly Garuda,
who has beautiful wings. The truth is one, but the sages (or learned
ones) call it by many names or describe him in many ways; they called
him Agni, Yama, Mātariśvan.
In Rig Veda, the Almighty God is called Indra, Vishnu, Agni, etc.(Rig veda 2.1.3)
Hero of Heroes, Agni! Thou art Indra, thou art Visnu of the Mighty
Stride, adorable: Thou, Brahmanaspati, the Brahman finding wealth:
thou, O Sustainer, with thy wisdom tendest us.
The same Almighty God has been eulogised by Vedic seers in many names, which are basically epithets. Savitr indicates the power of God, but not physical Sun.
There was no deifying in Rig Vedic Era.
Later in Puranas, deifying of Gods took place, which lead to confusion.