In #HarikathaAmruthasaara Sri #JaganathaDasaru addresses Lo…

Ekavimshati (# 21) arranged as,

(5) organs of perception (GnaAnendriya)
(5) organs of action (Karmendriya)
(5) Pancha Praana (Vital energy forces)
(5) Pancha Bhootha + Mind,

#Viswambhara roopi Paramatma who resides in all these elements is #Ganapati Upasana Moorti.
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Numerologically #Moon is ruling planet of #(2) who is called Mano-kaAraka signifying Mind & is star lord of #Hastha constellation.

Ganesha Chaturthi (Vinayaka Vratha) is held during Bhadrapada Masa when generally Moon will be @ or nearer 2 Hastha star on the day of Chaturti; ++

Ganapathi is son of Sri Rudra Devaru who is Mano-abhimani devatha (Mano-niyaamaka) the controller of Mind.

Ganapathi (having visesha Vaayu aavesha) anugraha is very much required to control the wavering mind and keep it focused on Hari Sarvottama - Vaayu Jeevottama; ++

Astrologically, Hastha nakshathra falls in the zodiac sign Virgo (Kanya Raasi) which also partly houses Uttara-Phalguni nakshathra whose star Lord is Sun representing # (1); Number ONE signifies independence, leadership etc... ++

Though Sun is GrahaAdhihpati leader of NavaGrahas, Lord Ganesha who is Ganapati, leader of Ganas (GanaAdhipati) is worshiped before offering pooja/homa 2 NavaGrahas;

Mercury (Budha) is sign Lord of Virgo (Kanya rasi) who represents # 5 (numerologically) & Buddhi (intelligence);+

Combination of 1+5 (Sun+Mercury) gives an astrological yoga called BudhaAditya Yoga resulting in high intelligence & skill.

To get rid of vaKra buddHi (purverted intelligence) & 2 have discriminative intelligence वक्रतुण्ड महाकाय (Lord Ganesha's) anugraha is very much required;+

Virgo sign is natural 6th (5+1=6) in the zodiac starting from Aries. # (6) also signifies Ari-Shadvargas viz. Kaama; Krodha; Lobha; Moha; Mada; Maatsarya which R impediments/barriers that cause Vighnas' in the growth & development of mankind, are responsible for... ++

all kinds of difficult experiences in our lives. By worshiping Lord Ganesha who is #VighnEshwara one can overcome these negative passions which are our internal enemies. ++

2+1=3. # 3 represents AUM (OM) in its diagrammatic aspect considered 2 be primordial. Viswambara moorti SriHari as Antaryaami & also having His visesha anugraha Ganapati (Aakaasa tattva) is said to be an embodiment of OmkaAra (Pranava Swaroopa) primordial 2 all Veda Manthras. ++

Number three (3) is considered as a highly sacred number that represents the Trinal Lords Brahma, Vishnu, Maheshwara (Shiva) and their energies Saraswathi, Lakshmi and Paarvathi. Known as Trimoorthi (Trinity) they are highly revered in Hindu philosophy. ++

Jupiter also known as Bruhaspathi the Deva Guru (divine preceptor) is the ruling planet of number (3) and astrologically he is Vidya kaaraka the significant for Vidya (education). Jupiter is considered as the largest planet in the solar system. ++

As abhimaani devatha for Aakaasa Tattva, Ganapathi is an elderly God who is offered obeisance first before commencement of Vidya & whose anugraha is very much required for acquiring Vidya and yathartha jnyaAna (Hari Sarvottama-Vaayu Jeevottama) & to dispel vipareeta jnyaAna. ++

Thus, Ganapati anugraha is very much required for/to
acquire vidya;
keep mind focused;
acquire discriminative intelligence;
develop leadership skills;
mitigate vipareeta jnyaana;
overcome obstacles (path to realisation)
overcome negative passions;
hassle-free progress in life;