Others worship Me (the Supreme) through knowledge-sacrifice, jñāna-yajña, contemplating upon Me as all-formed, also as singular, different and universal in expression.
After referring to the devotional ways of worship, Krishna speaks about Jñāna-yajña or knowledge-sacrifice, which is superior to material-sacrifice (4.33). The Supreme is all; everything is the Supreme Itself. The Supreme is universal in Its nature and magnitude, but It manifests in the form of umpteen entities, none of which is different from It. This is more an assessment and finding the mind accepts, letting all its differential notions subside completely.
While the worship mentioned earlier is oral and sensory, this is fully inner, based on the mind and intelligence. The worshipper develops the strength and compulsion to drop his delusional clinging and imbibes purity and wholesomeness to accept the new vision, and get settled in it.
As the Self is in oneself and all, the mind learns to feel and find Its universality.