Assalam alaikum Maulana. I have deep thoughts about Allah for sometime now. When I think about Allah different images of lights/creatures come to my mind and it’s been bothering me alot. As I know that we can not imagine Allah is this a sin for me? How can I stop these thoughts and these images? Please help.Thank You

Walaikumussalam
Alhumdulillah I’m pleased to learn that you realised that it is not right thing whenever any image comes your mind immediately say no it is wrong and read sura Ikhlas 5 times with translation and ponder in meaning
And read following Aayat from Quran when Hazrat Ibrahim as he argued with people it is very interesting

Holy Quran 6:76
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فَلَمَّا جَنَّ عَلَيْهِ اللَّيْلُ رَأَىٰ كَوْكَبًا ۖ قَالَ هَٰذَا رَبِّي ۖ فَلَمَّا أَفَلَ قَالَ لَا أُحِبُّ الْآفِلِينَ

So when the night covered him [with darkness], he saw a star. He said, "This is my lord." But when it set, he said, "I like not those that disappear."

Holy Quran 6:77
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فَلَمَّا رَأَى الْقَمَرَ بَازِغًا قَالَ هَٰذَا رَبِّي ۖ فَلَمَّا أَفَلَ قَالَ لَئِن لَّمْ يَهْدِنِي رَبِّي لَأَكُونَنَّ مِنَ الْقَوْمِ الضَّالِّينَ

And when he saw the moon rising, he said, "This is my lord." But when it set, he said, "Unless my Lord guides me, I will surely be among the people gone astray."
Holy Quran 6:78
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فَلَمَّا رَأَى الشَّمْسَ بَازِغَةً قَالَ هَٰذَا رَبِّي هَٰذَا أَكْبَرُ ۖ فَلَمَّا أَفَلَتْ قَالَ يَا قَوْمِ إِنِّي بَرِيءٌ مِّمَّا تُشْرِكُونَ

And when he saw the sun rising, he said, "This is my lord; this is greater." But when it set, he said, "O my people, indeed I am free from what you associate with Allah.
Holy Quran 6:79
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إِنِّي وَجَّهْتُ وَجْهِيَ لِلَّذِي فَطَرَ السَّمَاوَاتِ وَالْأَرْضَ حَنِيفًا ۖ وَمَا أَنَا مِنَ الْمُشْرِكِينَ

Indeed, I have turned my face toward He who created the heavens and the earth, inclining toward truth, and I am not of those who associate others with Allah."
Wassalam