When we say that one of the branches of “Tawhid” is the Oneness of the attributes it means that just as He is eternal and ever-living as a being His attributes, knowledge, might, decision etc too are eternal. These attributes are not external but part of His existence and they are not separate from each other; knowledge, might etc are one and an integral part of His being.

The explanation is that when we look at ourselves we find that at birth we were devoid of attributes for we had no knowledge or power etc. We gained these attributes as we grew up so we say that our attributes are externally gained and it is possible that we may exists but we may not have the strength or knowledge and it is also true that these knowledge and might are individual in each one of us. The strength lies in the arms and knowledge in our soul.

But this cannot be perceived for God and His attributes. His being includes knowledge and might and all His attributes constitute a singular existence in His being. We accept that we are devoid of such attributes so it is very difficult for us to understand this and except for intellectual arguments we have no proof.