The difference between the Lord's and Satan's presence

Right now I'm reading "Sheep in Wolves' Clothing" by Valerie J. McIntyre. It's a book about transference. In one passage on p. 14, McIntyre explains what it felt like to be in the Lord's presence when dealing with her transference experience:

When I chose to suffer honestly before God, looking only to Jesus on the Cross to bear my sin and sorrow, I found Him lifting that measure of pain from me and taking it into Himself. Sometimes I had sensory experiences of God's presence -- I felt myself cradled in a warm, loving embrace and heard lullabies.

She then goes on to explain what it felt like when Satan was around:

Still, there were times when I could not sort through what was false and stand in what was true. In those moments, there seemed to be a dark presence with me, one that was intent on getting me to accept as fact all manner of untruth about myself, others, and God.

McIntyre relied upon God during the times that she felt oppressed and eventually made her way out of the situation by total obedience to Him.