As his Phallic form is ever present in the observance of the Brahmacharya vow and as it adds to the glory of the world, he is called Maheshvara.
दिव्यं च ब्रह्मचर्येण लिङ्गमस्य यथा स्थितम्। महयत्येष लोकांश्च महेश्वर इति स्मृतः॥