illusion defined:

SB 2.9.34   TEXT 34
ṛte 'rthaṁ yat pratīyeta
na pratīyeta cātmani
tad vidyād ātmano māyāṁ
yathābhāso yathā tamaḥ
SYNONYMS
ṛte—without; artham—value; yat—that which; pratīyeta—appears to be; na—not; pratīyeta—appears to be; ca—and; ātmani—in relation to Me; tat—that; vidyāt—you must know; ātmanaḥ—My; māyām—illusory energy; yathā—just as; ābhāsaḥ—the reflection; yathā—as; tamaḥ—the darkness.
TRANSLATION
O Brahmā, whatever appears to be of any value, if it (appears  as it) is without relation to Me, has no reality. Know it as My illusory energy, that reflection which appears to be in darkness.

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danke für deine gegenwart und aufmerksamkeit, wir laden dich herzlichst ein:
bitte teile deine wertvollen ge.danken zu diesem thema, zum wohle aller leser mit uns :-)
OM.Liebe

thanx for your presence and attentiveness, we heartily invite you:
please, for the welfare of all, share your valuable thoughts on the subject with us :-)
OM.Love