When flowers to be offered to Deities in the temple are arranged in a sattvik manner, vibrations of bhav (Spiritual emotion) are created in them, which helps in worshipping with bhav. Applying kumkum to the forehead amounts to abiding by Achardharma (Code of righteous daily conduct).
When vegetables are cut after understanding the underlying science, it amounts to spiritual practice. When artworks are made in a sattvik manner, it provides sattvikata to the self as well as others. In this way, Paratpar Guru (Dr) Athavale has taught us how for spiritual practice to take place, every act should be performed perfectly, with bhav and in a sattvik manner.