योगवासिष्ठः yogavāsiṣṭhaḥ - book-1, chapter-31, verse-11

दृष्टसंसारगतिना दृष्टादृष्टविनाशिना ।
केनेव व्यवहर्तव्यं संसारवनवीथिषु ॥ ११ ॥

dṛṣṭasaṃsāragatinā dṛṣṭādṛṣṭavināśinā ,
keneva vyavahartavyaṃ saṃsāravanavīthiṣu 11

11. dṛṣṭasaṃsāragatinā dṛṣṭādṛṣṭavināśinā kena
iva vyavahartavyam saṃsāravanavīthiṣu

11. saṃsāravanavīthiṣu dṛṣṭasaṃsāragatinā
dṛṣṭādṛṣṭavināśinā kena iva vyavahartavyam

11. In the winding paths of worldly existence (saṃsāra), by whom should action be undertaken? (It should be undertaken) as if (guided) by one who has truly understood the course of (saṃsāra) and who overcomes both the manifest and the unmanifest.

Words meanings summery:

• दृष्टसंसारगतिना (dṛṣṭasaṁsāragatinā) - by one who has seen the course of worldly existence, by one who perceives the path of transmigration

• दृष्टादृष्टविनाशिना (dṛṣṭādṛṣṭavināśinā) - by one who destroys both the seen and the unseen, by one who annihilates manifest and unmanifest

• केन (kena) - by what? by whom?

• इव (iva) - like, as, as if

• व्यवहर्तव्यम् (vyavahartavyam) - it should be acted, it should be dealt with, (one's) conduct (should be)

• संसारवनवीथिषु (saṁsāravanavīthiṣu) - in the forest-paths of worldly existence

Words meanings and morphology

दृष्टसंसारगतिना (dṛṣṭasaṁsāragatinā) - by one who has seen the course of worldly existence, by one who perceives the path of transmigration

(adjective)

Instrumental, masculine, singular of dṛṣṭasaṃsāragati

dṛṣṭasaṁsāragati - one for whom the course of worldly existence is seen

Compound type : bahuvrīhi (dṛṣṭa+saṃsāragati)

• dṛṣṭa – seen, perceived, observed
  adjective
  Past Passive Participle
  Derived from root √dṛś (to see) + -ta suffix
  Root: dṛś (class 1)
• saṃsāragati – course of worldly existence, path of transmigration
  noun (feminine)

दृष्टादृष्टविनाशिना (dṛṣṭādṛṣṭavināśinā) - by one who destroys both the seen and the unseen, by one who annihilates manifest and unmanifest

(adjective)

Instrumental, masculine, singular of dṛṣṭādṛṣṭavināśin

dṛṣṭādṛṣṭavināśin - one who destroys both what is seen and what is unseen

Compound type : tatpurusha (dṛṣṭādṛṣṭa+vināśin)

• dṛṣṭādṛṣṭa – seen and unseen, manifest and unmanifest
  noun (neuter)
• vināśin – destroying, annihilating, one who destroys
  adjective
  Derived from root √naś (to perish) with prefix vi- and suffix -in
  Prefix: vi
  Root: naś (class 4)

केन (kena) - by what? by whom?

(pronoun)

Instrumental, masculine/neuter, singular of kim

kim - what?, which?, who?, why?

इव (iva) - like, as, as if

(indeclinable)

व्यवहर्तव्यम् (vyavahartavyam) - it should be acted, it should be dealt with, (one's) conduct (should be)

(gerundive)

Note: Used impersonally in the sense of 'one should act' or 'it should be acted upon'

संसारवनवीथिषु (saṁsāravanavīthiṣu) - in the forest-paths of worldly existence

(noun)

Locative, feminine, plural of saṃsāravanavīthi

saṁsāravanavīthi - paths of the forest of worldly existence

Compound type : tatpurusha (saṃsāravana+vīthi)

• saṃsāravana – forest of worldly existence
  noun (neuter)
• vīthi – path, way, street, road
  noun (feminine)