As salaamu alaykum the comment 'Whatever you do from worship is nothing' At first I was a bit confused.... so, it seems he's saying after worship make tawba. Al Humdulilaah even the smallest good deed is appreciated by Ash-Shakur. Its best to encourage. For example, Allah will mulitiple a deed over and over depending on the sincerity of the worshipper. If I fast and prayed all night and someone said your deeds are nothing that would be discouraging. Although I had to listen again to get the point. Words of encouragement and Allah accepting the smallest of deeds is extremely desired, esp these days. Similar to a husband who slaves all day to provide for his wife whom he loves dearly, and she disregards him or likewise a wife who does the same and is disregarded. Encouraging the Muslim army and so on. Tawba is the door to salvation and abundance from the heavens and earth. May Allah guide us all and forgive us all and bless us to submit completely to the Sunnah of Rasululaah so that we may obtain victory. Appreciate the advice. Allahuma Baarikum.