Why are you using the NASB™?
The primary and simple answer is personal preference. It’s what we use in live teaching and personal study. The secondary aspect can be found on the Walk with the Word web site, “Which Bible Translation Is Best for Me?” One of the main recommendations of this discourse is to try and study Scripture with more than one translation. In other words, we recommend supplementing the NASB™ with at least a couple of other translations such as the NLT™ and Amplified Bible™ or others of your choosing.