The 14-time major champion will end his 16-month injury absence at the Hero World Challenge on Thursday when he tees it up as host of the 18-man elite tournament.
It has been a long wait for the former world No.1, who last played at the Wyndham Championship in August 2015, and he admits there were times during his recovery that he thought he would never play again.
Woods delayed his return until this week's event in Bahamas having originally planned to make his comeback at the Safeway Open in October, only to withdraw because he felt his game was still vulnerable.
Despite having the extra time to work on his game, the 40-year-old admits there is still a feeling of anxiety about making his comeback, especially having given serious consideration to retirement in the last 16 months.
"There was a lot of trepidation and times where I did think of retirement because it was realistic," said Woods, who carded a two-under par round in Wednesday's Pro-Am.
"Not being able to get out of bed, not being able to move, how could I expect to come out here and swing a golf club at 120 miles an hour and be ballistic when I can't even get out of bed?
"When you're dealing with a spine, when you're dealing with nerves, it's a totally different deal. Davis Love had his neck fused, he had tingling down his arm and he couldn't feel his fingers anymore. That's, you know, your career could be over.
"But he had it fixed, came back and won last year. So there's a lot of guys who have had injuries like that and have come back and done well and have won golf tournaments."