In the Old Testament, God showed His people signs and wonders, and the prophets were used mightily of Him. In those days, God's Holy Ghost did not yet indwell those who sought Him out, but He came and went. I thought, how thankful we ought to be, in this age of grace, that the Holy Spirit indwells us as born again believers. We can and will never be without Him. He sees, goes with, and knows everything about us.
How powerfully it hits home with me when I remember that since I am born again, I can have the full assurance, presence and power of the Holy Ghost AT ALL TIMES. Even when I stray or sin against Him, He doesn't cast me out-- on the contrary, He steadies me and keeps me safe and sane. What an awesome God.