Any planet when it enters its own Nakshatra will give much stronger results. It is like being in your own house when storm is outside. In your own place you are protected. Therefore when Mercury enters Jyestha Nakshtra it becomes much stronger and gives much better results. Similarly Saturn when in Anuradha Nakshatra will give much better results. Sun will become weak as it is in the inimical Nakshatra. Strong Mercury which is your lagan lord and the planet of intelligence, confidence, speech and writing help you excel in your goals.