योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-186, verse-56

संकल्पनगरे बालः शिलाप्रोड्डयनं यथा ।
सत्यं वेत्त्यनुभूयाशु स्वविधेयनियन्त्रणम् ॥ ५६ ॥

saṃkalpanagare bālaḥ śilāproḍḍayanaṃ yathā ,
satyaṃ vettyanubhūyāśu svavidheyaniyantraṇam 56

56. saṅkalpa-nagare bālaḥ śilā-proḍḍayanam yathā
satyam vetty anubhūya āśu sva-vidheya-niyantraṇam

56. yathā saṅkalpanagare bālaḥ śilāproḍḍayanam
sva-vidheya-niyantraṇam anubhūya āśu satyam vetty

56. Just as a child in the city of imagination (saṅkalpa) quickly experiences and recognizes the reality of making a stone fly, through the control that is subject to its own will.

Words meanings summery:

• सङ्कल्प-नगरे (saṅkalpa-nagare) - in the city of imagination, in the city of resolve, in the mental city

• बालः (bālaḥ) - a child, a young person, an ignorant person

• शिला-प्रोड्डयनम् (śilā-proḍḍayanam) - making a stone fly, the flying of a stone

• यथा (yathā) - just as, as, according to

• सत्यम् (satyam) - truth, reality, real

• वेत्त्य् (vetty) - knows, understands, perceives

• अनुभूय (anubhūya) - having experienced, having perceived

• आशु (āśu) - quickly, swiftly, immediately

• स्व-विधेय-नियन्त्रणम् (sva-vidheya-niyantraṇam) - control over what is subject to one's own will/regulation, self-imposed control

Words meanings and morphology

सङ्कल्प-नगरे (saṅkalpa-nagare) - in the city of imagination, in the city of resolve, in the mental city

(noun)

Locative, neuter, singular of saṅkalpa-nagara

saṅkalpa-nagara - city of imagination, city of resolve, mental city

Compound type : tatpurusha (saṅkalpa+nagara)

• saṅkalpa – intention, will, imagination, mental conception, resolve (saṅkalpa)
  noun (masculine)
  derived from root kḷp with prefix sam-
  Prefix: sam
  Root: kḷp (class 10)
• nagara – city, town
  noun (neuter)

बालः (bālaḥ) - a child, a young person, an ignorant person

(noun)

Nominative, masculine, singular of bāla

bāla - child, young, ignorant

शिला-प्रोड्डयनम् (śilā-proḍḍayanam) - making a stone fly, the flying of a stone

(noun)

Accusative, neuter, singular of śilā-proḍḍayana

śilā-proḍḍayana - making a stone fly, the act of a stone flying upwards

Compound type : tatpurusha (śilā+proḍḍayana)

• śilā – stone, rock
  noun (feminine)
• proḍḍayana – flying, soaring, leaping
  noun (neuter)
  derived from root ḍī (to fly) with prefixes ut and pra
  Prefixes: pra+ut
  Root: ḍī (class 1)

Note: Object of vetty.

यथा (yathā) - just as, as, according to

(indeclinable)

सत्यम् (satyam) - truth, reality, real

(noun)

Accusative, neuter, singular of satya

satya - truth, reality, real, true

वेत्त्य् (vetty) - knows, understands, perceives

(verb)

3rd person , singular, active, present (laṭ) of vid

Present active indicative, 3rd person singular

From root vid, 2nd class, atti type.

Root: vid (class 2)

अनुभूय (anubhūya) - having experienced, having perceived

(indeclinable)

Absolutive (gerund)

Formed from root bhū with prefix anu-.

Prefix: anu

Root: bhū (class 1)

आशु (āśu) - quickly, swiftly, immediately

(indeclinable)

स्व-विधेय-नियन्त्रणम् (sva-vidheya-niyantraṇam) - control over what is subject to one's own will/regulation, self-imposed control

(noun)

Accusative, neuter, singular of sva-vidheya-niyantraṇa

sva-vidheya-niyantraṇa - control over what is subject to one's own will, self-control

Compound type : tatpurusha (sva+vidheya+niyantraṇa)

• sva – own, oneself, one's own property
  pronoun (masculine)
• vidheya – to be done, to be regulated, subject to, amenable
  adjective (masculine)
  Gerundive
  From root dhā with prefix vi- and suffix -eya.
  Prefix: vi
  Root: dhā (class 3)
• niyantraṇa – control, restraint, governing
  noun (neuter)
  Derived from root yam with prefix ni- and nominal suffix lyuṭ (ana).
  Prefix: ni
  Root: yam (class 1)

Note: Object of anubhūya.