Default Double checking, am I good to go?

Sorry if this is a dumb question, but I ****ed up my last S3 and I want to double check before I proceed.

Download mode says:

Product name: SGH-T999
Custom Binary Download: No
Current Binary: Samsung official
system status: official
qualcom secure bot: enable
Warranty Bit: 0
Booatloader RP SWREV: 1

My question is: Is it safe for me to use CF-Auto-Root (T999 Version) as-is with Odin? The website says "If you have locked bootloaders, flashing one of these will probably brick your device" so I'm not sure if it will brick my device? I'm on 4.3 and I read a few issues with "knox" and I'm not sure if I will have this problem or not.

Basically, I'm asking if I'm good to go ahead and flash CF-Auto-Root through Odin and nothing will happen. Thanks.